问题
选择题
The Internet, as _____ means of communication, has been popular since _____ early 1990s. [ ]
A. a ; the
B. a ; /
C. a ; an
D. the ; an
答案
答案：A
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The Internet, as _____ means of communication, has been popular since _____ early 1990s. [ ]
A. a ; the
B. a ; /
C. a ; an
D. the ; an
答案：A